1. Recall the assumption for the CMLRM: (Homoskedasticity) 2. Counterexamples 1、rich family and poor family expenditures; 2、large company and small company sales. There exists heteroskedasticity in lots of econometric problems

1.何谓 Multicollinearity =Xb+a One of the conditions for ols: Tadde+k12

General linear models Suppose that we have a model: 1 It is inherently linear for the parameters if it can be transformed into Examples: 1. Exponential model: Y

目录

回归分析 1.根据经济理论或考察样本数据去设定回 归方程 X…Z Y: dependent variable; independent random error or disturbance term

1.光分析法 2.分离分析法 3.电分析法 4.联用技术

3.1 荧光的产生 3.2 荧光光谱曲线 3.3 荧光的影响因素 3.4 定量分析 3.5 荧光光度计 3.6 实验技术 3.7 荧光法的应用

5.1 基本原理 5.3 傅立叶变换红外光谱仪 5.4 定性分析

3.1概述 单质可形成原子晶体金属晶体

7.1铜族元素 7.1.1铜族元素通性